JP2000167338A - Waste gas treatment method and bio-soil filter employed therefor and waste gas purification system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an economical method and system with a simple structure and capable of efficiently purifying waste gas. SOLUTION: A waste gas is supplied to a liquid storing chamber 1, in which water as a treatment liquid is stored, by a gas supply body and the waste gas is dissolved in or mixed with the treatment liquid. The treatment liquid is taken out through a liquid taking out part and retreated by a bio-soil filter 24. In the bio-soil filter 24, the treatment liquid overflows out of underground pipes and fills and reaches the soil layer and the waste gas components are decomposed by microorganism propagated in the soil layer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a system for purifying waste gas from vehicles or various industrial equipment.

[0002]

BACKGROUND OF THE INVENTION The invention of the present application removes waste products such as nitrogen oxides, carbon monoxide, and hydrocarbons, which are atmospheric gas pollutants created by vehicle exhaust and causing photochemical smog in the presence of sunlight. It is aimed at improving air quality. Internal combustion engines convert 25% of fuel into energy, but convert 75% into unusable by-products. Various air purifying devices have been developed to solve the problem of air pollution. However, they were complex structures and expensive despite limited purification effects.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and has an inexpensive method and system having a simple structure and capable of effectively purifying waste gas. Have technical significance to provide.

[0004]

Means for Solving the Problems In order to solve the above-mentioned problems, the invention according to claim 1 of the present application dissolves or mixes the waste gas into the processing liquid by passing the waste gas through the processing liquid, and the processing liquid is used to remove microorganisms. It has a configuration in which the waste gas component in the treatment liquid is supplied to the existing soil layer, and the waste gas component in the treatment liquid is decomposed by the action of microorganisms to detoxify, reduce toxicity, or purify. According to a second aspect of the present invention, in order to solve the above-mentioned problem, in the configuration of the first aspect, the waste gas is exhaust gas of an internal combustion engine. According to a third aspect of the present invention, in order to solve the above-mentioned problem, in the first or second aspect, the treatment liquid is water. According to a fourth aspect of the present invention, there is provided a bio soil filter used in the method according to any one of the first to third aspects, wherein the waterproof layer and the waterproof layer are laid underground. And a filling layer filled with the processing solution in which the waste gas is dissolved or mixed and a filling layer provided on the filling layer, wherein the microorganism is present but a soil layer is provided. Further, in order to solve the above problem, according to a fifth aspect of the present invention, in the configuration of the fourth aspect, the filled layer includes an underground pipe through which a processing solution in which the waste gas is dissolved or mixed is supplied. With
The underground pipe has a port having a hole, and the processing liquid is discharged from the port and filled. In order to solve the above-mentioned problem, the invention according to claim 6 is the invention according to claim 5, wherein the underground pipe is
The processing liquid is circulated. Further, in order to solve the above problem, the invention according to claim 7 is as follows.
What is claimed is: 1. A waste gas purifying system for treating waste gas for detoxification, toxicity reduction or purification, comprising a storage chamber in which a processing liquid is stored, and a waste gas supply unit for supplying waste gas to the processing liquid in the storage chamber. And, a liquid discharging part for taking out the processing liquid in which the waste gas is dissolved or mixed, and a bio soil filter to which the processing liquid is supplied from the liquid discharging part, wherein the bio soil filter has a waterproof layer provided in the ground. , Consisting of a reservoir layer provided above the waterproof layer and a soil layer provided above the reservoir layer. In the soil layer, the waste gas components in the treatment liquid are decomposed to detoxify and poison It has a configuration in which microorganisms to be reduced or purified are present. In order to solve the above-mentioned problem, the invention according to claim 8 has a configuration according to claim 7, wherein the waste gas is exhaust gas of an internal combustion engine. According to a ninth aspect of the present invention, in order to solve the above-mentioned problem, in the configuration of the seventh or eighth aspect, the treatment liquid is water.

[0005]

Embodiments of the present invention will be described below. 1 to 4 are diagrams showing an embodiment of a waste gas purification system of the present invention. this house,
1 is a perspective schematic perspective view of the entire system, FIG. 2 is a schematic front perspective view, FIG. 3 is a schematic left side view, and FIG. 4 is a schematic right side view.

The system shown in FIGS. 1 to 4 comprises a metal storage chamber 1 for storing a processing liquid and a storage chamber 1.
A waste gas collecting unit 2 connected to the pump 3, a pump 3 for extracting waste gas from the waste gas collecting unit 2 and sending it to the liquid storage chamber 1, and an exhaust box 4 attached to the pump 3.
An exhaust pipe 5 connected to the exhaust box 4, two gas supply bodies 6 connected to the exhaust pipe 5 and having a gas discharge port 7 for discharging waste gas into the processing liquid, and adjacent to the liquid storage chamber 1 Gas reservoir 10, a liquid discharge unit 13 for extracting liquid from the liquid storage chamber 1, a liquid feed pipe 14 for supplying the liquid extracted from the liquid discharge unit 13 to processing, and an intake of oxygen. For this purpose, an atmospheric pressure communicating pipe 15 for communicating atmospheric pressure with the space inside the liquid storage chamber 1 and a metal radiating fin 16 provided on the outer surface of the liquid storage chamber 1
And an inspection lid 17.

The processing liquid in the storage chamber 1 may be ordinary water. The liquid storage chamber 1 may be configured such that a lid is provided on an upper plate portion or the like, and the processing liquid is poured into the interior by opening and closing the lid. The waste gas collection unit 2 is configured to collect, for example, vehicle exhaust gas. The gas supply 6 is a tubular member. The gas discharge ports 7 are small holes provided in the gas supply 6, and are provided in a large number in the length direction of the gas supply 6 at predetermined intervals. According to the gas pressure set by the pump 3, waste gas is released from the gas release boat 7 as bubbles 8 into the processing liquid.

[0008] The gas reservoir 10 temporarily stores the processed gas. It is connected to a space 11 above the liquid level 9 in the liquid storage chamber 1. A treated gas discharge pipe 12 is connected to the gas reservoir 10. 1 and 2 are perspective views. Actual storage chamber 1
Is a sealed container and the inside is not visible.

The operation of the above system will be described. The waste gas collected by the waste gas collection unit 2 is pressurized by the pump 3, temporarily stored in the exhaust box 4, and then sent to the gas supply 6 via the exhaust pipe 5. The waste gas in the gas supply 6 is discharged from the gas discharge port 7 into the processing liquid. The toxic or polluted components of the released waste gas (hereinafter, waste gas components) are dissolved or mixed in the processing liquid.
In parallel with the discharge of the waste gas from the gas discharge port 7, the processing liquid flows into the gas supply body 6 little by little. This processing solution
The liquid is taken out from the liquid outlet 13 and reaches the liquid feed pipe 14.

On the other hand, the remainder of the waste gas not mixed with the processing liquid in the liquid storage chamber 1 accumulates in the space 11 above the liquid level 9 in the liquid storage chamber 1. This remaining waste gas is waste gas from which waste gas components have been removed or reduced. The remaining waste gas is temporarily stored in the gas storage device 10 and then released from the treated gas discharge pipe 12 to the atmosphere.

The radiating fins 16 are provided on the assumption that waste gas has a high temperature, such as exhaust gas from an internal combustion engine. When the waste gas has a high temperature, the temperature of the liquid storage chamber 1 is also likely to be high. The radiation fins 16 are provided in the storage chamber 1.
Is released into the atmosphere to suppress a rise in the temperature of the liquid storage chamber 1.

FIGS. 5, 6 and 7 show another embodiment of a waste gas purifying system including a structure for treating the processing liquid discharged from the waste gas purifying system as shown in FIGS. FIG. Details of the storage chamber 1 shown in FIG. 5 are shown in FIG. The configuration of the liquid storage chamber 1 is substantially the same as that shown in FIGS. 1 to 4, and a description thereof will be omitted.

As can be seen from FIGS. 5 and 6, in the present embodiment, the liquid feed pipe 14 is connected to an intermediate liquid reservoir 19. The pipe downstream from the intermediate liquid reservoir 19 is branched into two. One pipe is connected to the liquid collector 20. The processing liquid in the liquid collector 20 is sent to the transport tank 22 by the liquid sending pump 21. The treatment liquid in the transport tank 22 is sent to the bio soil filter 24 via the distributor 23. The other pipe from the intermediate sump 19 is connected via a distributor 23 or directly to a bio soil filter 24. still,
The transport tank 22 may be transported by truck or the like, and the location where the waste gas treatment chamber 18 is provided may be different from the location where the bio soil filter 24 is provided.

FIGS. 8 to 10 are diagrams for explaining another embodiment of the present invention. In FIG. 8, the liquid storage chamber 1 is mounted at the rear of the motorcycle. Motorcycle exhaust gas is introduced into the liquid storage chamber 1 and purified. When the motorcycle travels a predetermined distance, a pipe (not shown) is connected, and the processing liquid is stored in the intermediate liquid reservoir 25. When a predetermined amount of the treatment liquid is accumulated in the intermediate liquid reservoir 25, the treatment liquid is sent to a bio soil filter 24 described later to reprocess the treatment liquid.

In FIG. 9, a liquid storage chamber 1 is provided in a trunk of a passenger car. A tube for supplying exhaust gas to the liquid storage chamber 1 is provided. The exhaust gas is sent to the storage chamber 1 and is purified as described above. When the passenger car travels for a predetermined distance, a pipe (not shown) is connected to store the processing liquid in the intermediate liquid reservoir 25. FIG.
In this, waste gas from an airplane is introduced into the liquid storage chamber 1 and purified. This is suitable, for example, when collecting and purifying waste gas during idling of an airplane. Take out the processing liquid from the liquid storage chamber 1,
It is sent to the bio soil filter 24.

FIGS. 11 to 13 show still another embodiment. The liquid storage chamber 1 is provided on the roof of the bus in FIG. 11, on the roof of the passenger car in FIG. 12, and on the roof of the truck in FIG. In any case, the exhaust gas is sent to the liquid storage chamber 1 by a pipe (not shown) to be purified.

FIG. 14 shows still another embodiment of the present invention. In the embodiment shown in FIG. 14, waste gas from the factory 26 is sent to the liquid storage chamber 1 by the pump 28 to be purified. The treatment liquid used in the liquid storage chamber 1 is finally sent to the bio soil filter 24. As shown in FIG. 14, the treatment liquid used in the liquid storage chamber 1 is sent to the bio soil filter 24, sent through the distributor 23, or stored in the tank 29, and Or sent via the Internet.

FIGS. 15 to 19 are diagrams for explaining the configuration of the bio soil filter 24 constituting the system according to the embodiment of the present invention. 15 is a schematic perspective view of the bio soil filter 24, FIG. 16 is a schematic cross-sectional view of the bio soil filter 24, FIG. 17 is a diagram showing a connection structure of an end of an underground pipe 36, and FIG. FIG. 19 is a schematic plan view of the bio soil filter 24.

The bio-soil filter 24 is a filter for detoxifying, reducing the toxicity, or purifying the polluted or toxic treatment liquid by dissolving or mixing the waste gas by the action of microorganisms. The bio soil filter 24 is constructed by digging down the ground of a certain section, and is a kind of underground structure. The bio soil filter 24 includes a waterproof layer 44 laid along the bottom surface and side surfaces of the concave portion formed by digging the ground, a plurality of underground pipes 36 arranged side by side above the waterproof layer 44, And a main pipe 33 connected thereto.

As shown in FIG. 15, a main pipe 33 extends in a horizontal direction perpendicular to the direction in which the pipe 36 extends in each place. As shown in FIG. 15, the main pipe 33 is connected to the distributor 23.
Is connected to The plurality of underground pipes 36 are provided at two slightly different heights as shown in FIG. Correspondingly, two main pipes 33 are provided above and below (only one is shown in FIG. 15). An upper underground pipe group 36 is connected to the upper main pipe 33, and a lower underground pipe group 36 is connected to the lower main pipe 33. The end of each underground pipe 36 may be closed with a flange-like blocking plate, or the ends of adjacent underground pipes 36 may be connected by an end connecting pipe 35 as shown in FIG. The underground pipe 36 is provided with ports at predetermined intervals. The port is a slot-shaped hole. The port may be on the lower surface, the side surface, or the upper surface of the liquid supply pipe.

The underground piping 36 is provided in the panel unit 43. The panel unit 43 has a regular triangular cylindrical shape as shown in FIGS. The panel units 43 are arranged side by side so that the upper and lower sides of the triangle are alternately reversed. And each panel unit 4
3 is inserted. The upper underground pipe 36 is located in the panel unit 43 that is convex downward, and the lower underground pipe 36 is located in the panel unit 43 that is convex upward. Each panel unit 43 has a slot (not shown). Each panel constituting the panel unit 43 is made of plastic or paper such as corrugated paper. The above-mentioned central piping 36 and panel unit 43
Constitutes a full layer. That is, the processing liquid sent from the distributor 23 through the main pipe 33 is discharged from the port of the pipe 43 throughout the place, and fills the waterproof layer 44.

The upper side of the layer provided with the panel unit 43 is a soil layer 45. In the soil layer 45, a modifier layer 39 is provided. Lime is used as a modifier. The vegetation 42 is provided on the soil layer 45. The vegetation 42 is, for example, a lawn such as a park or a garden, or a vegetation. Alternatively, there may be a lawn on a sports ground such as a soccer field.

The operation of the bio soil filter 24 shown in FIGS. 15 to 19 will be described below. As shown in FIGS. 15 and 18, of the two main pipes 33, the upper main pipe 33 is used for supplying liquid, and the lower main pipe 33 is used for discharging liquid. The distributor 23 that has received the supply of the processing liquid from the storage chamber (not shown) sends the processing liquid to the upper main pipe 33 and distributes the processing liquid to the underground pipe 36 connected to the upper main pipe 33. The processing liquid leaks out from the port of the piping 36 in the upper part and fills each panel unit 43. The filled processing solution reaches the upper soil layer 45.

The treatment liquid that has reached the soil layer 45 is
Is decomposed by the action of microorganisms such as bacteria existing in the plant and detoxified or reduced in toxicity. More specifically, as is well known, microorganisms that fix nitrogen and supply them to plants and microorganisms that decompose hydrocarbons exist in soil. Waste gas components dissolved or mixed in the processing solution
It is taken up by these microorganisms or decomposed by microorganisms. As a result, the treatment liquid is detoxified or reduced in toxicity. The lime provided in the modifier layer 39 functions to alkalize active nitrogen or a nitrogen compound to make it neutral. Substances degraded by microorganisms may become nutrients of the vegetation 42.

The treatment liquid reaches the soil layer 45 from the panel unit 43 when the treatment liquid evaporates, the waste gas component in the treatment liquid evaporates, or the treatment liquid is sucked up by a capillary phenomenon. This is done by: In order to perform the capillary action efficiently, the modifier layer 39 or the soil layer 45 is required.
For example, it is preferable to provide a honeycomb-like porous layer in which vertically long pores are packed and arranged.

The processing liquid collected in the panel unit 43 is discharged by the underground pipe 36 on the lower side, and returns to the distributor 23. Then, in the distributor 23, a part of the returned processing liquid is passed through the upper main pipe 33 by the pump 49 and then returned to the panel unit 43.
And the other part is finally discharged to sewage facilities as normal wastewater. In some cases, 100% of the returned processing liquid may be recycled, or 100% may be discharged to sewage.

In the bio soil filter 24, a configuration for aeration (aeration) may be provided to increase the activity of aerobic bacteria. For example, a duct with a ventilation hole for aeration is provided in the soil layer 45 or between the soil layer 45 and the panel unit 43, and the fan is used to send air into the duct for aeration. If raising the temperature is effective for bacterial activity, air heated by a heater may be sent.

The amount of liquid sent by the pump 49 provided in the distributor 23 is adjusted so that the amount of the processing liquid in the packed bed is optimal. If it is necessary to drain water efficiently due to rain or the like, reduce the amount of liquid to be sent and
If is supposed to be dry, increase the liquid sending amount.

FIG. 20 is a diagram showing one application of the waste gas purification system of the embodiment. The waste gas purification system of the present embodiment is effective for solving problems such as air pollution that occur when raising livestock, especially cattle. Air polluted by raising cattle, pigs or other livestock is cleaned by a waste gas purification system. Then, the treated liquid is distributed to a bio-soil filter 24 provided on a pasture by a distributor 23.
And is used for cultivation of vegetation 42 such as pasture on pasture, as described above.

The system of the present embodiment is preferably installed on a high place such as a roof of a building. The air in many cities is polluted by vehicle exhaust, rubber particles from tires, tarmacs, and the like, and photochemical smog may occur. The system according to the present embodiment is installed at a high place such as the roof of a building, and the air is taken in and purified. Then, the processing liquid is sent to the bio soil filter 24 provided on the ground to reprocess the processing liquid. Since the vegetation 42 may be applied to the roof of a building or the like, the biosoil filter 24 may be provided at that location for reprocessing.

The system of the present embodiment can also be used to treat tobacco smoke. The smoke of the tobacco is collected, sent into the storage chamber 1, and dissolved or mixed with the treatment liquid as described above. The treatment liquid is reprocessed by the bio soil filter 24 as described above. Turpentine, acetone, benzopyrene, propylene glycol, arsenic, butane, buthane, methoplen
e) Chemicals contained in tobacco smoke, such as cadmium, lead, ammonia, formaldehyde, benzyne, are removed by the bio soil filter 24.

The bio soil filter 2 in the present embodiment
4 can also be used for ordinary sewage treatment. The sewage can be circulated through the underground pipe 36 as described above, supplied into the soil, decomposed by microorganisms, and detoxified or reduced in toxicity. Further, the bio soil filter 24 in the present embodiment can be applied to fertilization of soil. That is, a material serving as a fertilizer may be mixed with the treatment liquid supplied to the soil.

The structure of the bio soil filter 24 described above can be applied to a system for collecting and using rainwater. Although water was used as the treatment liquid, a liquid specially prepared may be used as the treatment liquid. The configuration of the above-described embodiment is not limited in any way, and many modifications are possible. Also, the invention described in each claim is not limited to the literal meaning, and many modifications are possible, including a so-called equivalent range.

[0034]

As described above, according to the invention of each claim of the present application, waste gas is passed through the treatment liquid, and the treatment liquid in which the waste gas component is dissolved or mixed is decomposed by the action of microorganisms in the soil. Therefore, the waste gas can be purified with a simple and inexpensive configuration. Claim 3
According to the invention described in the ninth aspect, since the processing liquid is water, the configuration is further reduced.

[Brief description of the drawings]

FIG. 1 is a perspective schematic perspective view of an entire waste gas purification system according to an embodiment of the present invention.

FIG. 2 is a schematic front perspective view of the system shown in FIG. 1;

FIG. 3 is a schematic left side view of the system shown in FIG. 1;

FIG. 4 is a schematic right side view of the system shown in FIG. 1;

FIG. 5 is a diagram illustrating another embodiment of the waste gas purification system including a configuration for processing the processing liquid discharged from the waste gas purification system as shown in FIGS. 1 to 4;

FIG. 6 is a diagram illustrating another embodiment of the waste gas purification system including a configuration for processing the processing liquid discharged from the waste gas purification system as shown in FIGS. 1 to 4;

FIG. 7 is a diagram illustrating another embodiment of the waste gas purification system including a configuration for processing the processing liquid discharged from the waste gas purification system as shown in FIGS. 1 to 4;

FIG. 8 is a diagram illustrating another embodiment of the present invention.

FIG. 9 is a diagram illustrating another embodiment of the present invention.

FIG. 10 is a diagram illustrating another embodiment of the present invention.

FIG. 11 is a diagram illustrating still another embodiment of the present invention.

FIG. 12 is a diagram illustrating still another embodiment of the present invention.

FIG. 13 is a diagram illustrating still another embodiment of the present invention.

FIG. 14 is a diagram illustrating still another embodiment of the present invention.

FIG. 15 is a schematic perspective view illustrating a configuration of a bio soil filter 24 constituting a system according to an embodiment of the present invention.

16 is a schematic sectional view of the bio soil filter 24 shown in FIG.

17 is a view showing a connection structure of an end of an underground pipe in the bio soil filter shown in FIG.

18 is a diagram illustrating circulation of a treatment liquid in the bio soil filter 24 shown in FIG.

19 is a schematic plan view of the bio soil filter 24 shown in FIG.

FIG. 20 is a diagram showing one application of the waste gas purification system of the embodiment.

[Explanation of symbols]

 1 Storage chamber 24 Bio soil filter 45 Soil layer 42 Vegetation

Continued on the front page (72) Inventor James Patterson Isaat Canada British Columbia North Vancouver Bay Crest Drive 986

Claims (9)

[Claims] 1. A waste gas is passed through a treatment liquid to dissolve or mix in the treatment liquid, the treatment liquid is supplied to a soil layer where microorganisms are present, and waste gas components in the treatment liquid are decomposed by the action of microorganisms. A waste gas treatment method comprising performing reprocessing for detoxification, toxicity reduction, or purification. 2. The waste gas treatment method according to claim 1, wherein the waste gas is exhaust gas of an internal combustion engine. 3. The waste gas treatment method according to claim 1, wherein the treatment liquid is water. 4. A bio-soil filter used in the method according to claim 1, wherein the waste gas is provided together with a waterproof layer laid underground and provided on the waterproof layer. A bio-soil filter comprising: a filled layer that fills a treatment solution in which is dissolved or mixed; and a soil layer provided on the filled layer and in which the microorganisms are present. 5. The underfill pipe includes an underground pipe into which a processing solution in which the waste gas is dissolved or mixed is supplied, and the underground pipe has a port formed of a hole, and The bio soil filter according to claim 4, wherein the treatment liquid is discharged and filled. 6. The bio soil filter according to claim 5, wherein the underground pipe circulates a treatment liquid. 7. A waste gas purifying system for treating waste gas for detoxification, toxicity reduction or purification, wherein the waste gas is supplied to a storage chamber in which the processing liquid is stored and the processing liquid in the storage chamber. A waste gas supply body, a liquid discharging unit for extracting the processing liquid into which the waste gas is dissolved or mixed, and a bio soil filter to which the processing liquid is supplied from the liquid discharging unit, wherein the bio soil filter is provided underground. Water layer, a liquid storage layer provided on the water resistant layer, and a soil layer provided on the liquid storage layer.The soil layer decomposes waste gas components in the treatment liquid. A waste gas purification system characterized by the presence of microorganisms for detoxification, toxicity reduction or purification. 8. The waste gas purifying system according to claim 7, wherein the waste gas is exhaust gas of an internal combustion engine. 9. The waste gas purifying system according to claim 7, wherein the treatment liquid is water.